Skip to main content
Call AIBook a demo
HCPCS A4637 · Level II · A code

A4637: Replacement, tip, cane, crutch, walker, each., HCPCS Level II A code

Compiled from CMS files by the QuickIntell RCM Editorial Team · Data effective · Method: reference methodology · Report a data correction

Data currency: HCPCS Level II file: October 2026 (effective October 1, 2026); PFS relative value file: RVU26D, released August 26, 2026 (effective October 1, 2026); DMEPOS fee schedule: DME26-D (October 2026) (effective October 1, 2026); NCCI MUE tables: 2026 Q4 (effective October 1, 2026); NCCI PTP edits: v323r0 (2026 Q4) (effective October 1, 2026); OPPS Addendum B: October 2026 (effective October 1, 2026); Medicare Coverage Database LCD export: MCD release October 8, 2026 (effective October 4, 2026). Next CMS release: January 1, 2027 (quarterly update) for the HCPCS Level II file and DMEPOS fee schedule and NCCI MUE tables and NCCI PTP edits and OPPS Addendum B; RVU27A with the CY2027 PFS final rule, effective January 1, 2027 for the PFS relative value file; weekly, every Thursday for the Medicare Coverage Database LCD export.

Key facts for A4637

Medicare payment
$2.20
DMEPOS non-rural state fees (NU)
Coverage code
D
special coverage instructions apply
DME supplier MUE
4
MAI 2
OPPS status
SI E1
Non-allowed item or service
NCCI PTP pairs
0
practitioner file
LCDs and articles
2 / 0

TL;DR

A4637 is a Level II code from the A section (transportation, medical and surgical supplies, administrative, miscellaneous and investigational), in use since 1991: "Replacement, tip, cane, crutch, walker, each.". A4637 is paid from the DMEPOS fee schedule as inexpensive and other routinely purchased items (IN): NU (purchased, new) $2.20 in every contiguous state, rural $2.22 to $2.42; NU-KE (purchased, new) no state fee, rural $2.38 to $2.61; RR (rental) $0.22 in every contiguous state, rural $0.26 to $0.29 (3 more modifier rows on this page), October 2026. MUE limits for A4637: practitioner 0 (MAI 3, CMS Policy); hospital outpatient 0 (MAI 3, CMS Policy); DME supplier 4 (MAI 2, Code Descriptor / CPT Instruction). 2 active LCDs list A4637: L33733 (Canes and Crutches), L33791 (Walkers). OPPS status indicator E1: Non-allowed item or service. HCPCS record: BETOS D1E (other DME); pricing indicator 32; type of service A (used DME), P (lump-sum purchase of DME, prosthetics or orthotics), R (rental of DME). 1 other active code opens with "Replacement"; related codes: A4636, A4641, A4630, A4649.

A4637 descriptor and code status

The October 2026 HCPCS Level II file describes A4637 as “Replacement, tip, cane, crutch, walker, each.”. It sits in the A section (transportation, medical and surgical supplies, administrative, miscellaneous and investigational), listed with the other A codes.

HCPCS file attributes of A4637
FieldValue
Short descriptorRepl tip cane/crutch/walker
Added to HCPCS1991-01-01
Last actionN (no maintenance), effective 1996-01-01
Coverage codeD: special coverage instructions apply
Pricing indicator32: DMEPOS inexpensive and routinely purchased DME (floors and ceilings)
BETOS categoryD1E: other DME
Type of serviceA: used DME; P: lump-sum purchase of DME, prosthetics or orthotics; R: rental of DME

Medicare payment for A4637

A4637 is paid from the DMEPOS fee schedule as inexpensive and other routinely purchased items (IN): NU (purchased, new) $2.20 in every contiguous state, rural $2.22 to $2.42; NU-KE (purchased, new) no state fee, rural $2.38 to $2.61; RR (rental) $0.22 in every contiguous state, rural $0.26 to $0.29 (3 more modifier rows on this page), October 2026. The amounts below are national figures from the October 2026 CMS files; the contractor applies the locality, rural or state adjustment and the beneficiary's cost sharing.

Physician fee schedule (RVU26D)

Status X: statutory exclusion: not a physician service under the fee schedule. Global period XXX (global surgery concept does not apply); PC/TC indicator 9 (professional/technical concept does not apply).

DMEPOS fee schedule (DME26-D)

Jurisdiction D (DME MAC), payment category IN (inexpensive and other routinely purchased items). Fees are set per state; AK, HI, PR and VI are not subject to the national ceiling and floor and are listed separately. A rural fee applies only in ZIP codes on the CMS rural ZIP list.

DMEPOS fees for A4637 by modifier
ModifierFloor / ceilingNon-rural state rangeRural rangeAK / HI / PR / VI
NU (purchased, new)—$2.20 (49 states)$2.22 (AL, AZ, FL…) to $2.42 (AR, CA, CO…)AK $3.02, HI $3.18, PR $2.76, VI $2.22
NU (purchased, new), KE (competitive bid round 1, non-bid base equipment)——$2.38 (AL, AZ, FL…) to $2.61 (AR, CA, CO…)AK $3.30, HI $3.48, PR $3.01, VI $2.38
RR (rental)—$0.22 (49 states)$0.26 (AL, CO, DC…) to $0.29 (AR, AZ, CA…)AK $0.32, HI $0.34, PR $0.32, VI $0.26
RR (rental), KE (competitive bid round 1, non-bid base equipment)——$0.29 (AL, CO, DC…) to $0.32 (AR, AZ, CA…)AK $0.35, HI $0.37, PR $0.35, VI $0.29
UE (purchased, used)—$1.66 (49 states)$1.68 (AL, AZ, FL…) to $1.82 (AR, CA, CO…)AK $2.28, HI $2.37, PR $2.06, VI $1.70
UE (purchased, used), KE (competitive bid round 1, non-bid base equipment)——$1.80 (AL, AZ, FL…) to $1.97 (AR, CA, CO…)AK $2.49, HI $2.60, PR $2.24, VI $1.83

Hospital outpatient (OPPS Addendum B)

Status indicator E1 (Non-allowed item or service), with no separate OPPS payment rate.

Medically Unlikely Edits for A4637

MUE limits for A4637: practitioner 0 (MAI 3, CMS Policy); hospital outpatient 0 (MAI 3, CMS Policy); DME supplier 4 (MAI 2, Code Descriptor / CPT Instruction). The DME supplier MUE is a date-of-service policy edit: units above the limit deny even when split across lines, and appeals rarely succeed.

MUE values for A4637 by setting
SettingMUE (units/DOS)MAICMS rationale
Practitioner services03 Date of Service Edit: ClinicalCMS Policy
Facility outpatient hospital03 Date of Service Edit: ClinicalCMS Policy
DME supplier42 Date of Service Edit: PolicyCode Descriptor / CPT Instruction

The MUE lookup for A4637 shows every setting next to any other code on the same claim.

NCCI edits and add-on rules

No active practitioner PTP pair lists A4637 in v323r0.

A4637 is neither an add-on code nor a designated primary code in the 2026 Q4 NCCI add-on edit file.

Pair counts show exposure, not the answer for one claim. Check A4637 against a second code to see whether the pair bundles and whether a modifier can separate the services.

Medicare coverage policies for A4637

2 active Local Coverage Determinations and 0 billing and coding articles list A4637. Each applies only in its contractor's jurisdiction, and the article carries the diagnosis codes that support the item or service.

Denials to expect on A4637

CARC 50 · N115

the diagnosis or documentation does not meet the LCD or billing article that lists A4637

CARC 151 · N362

units of A4637 exceed the DME supplier MUE of 4 per date of service

CARC 4

the NU, KE, RR payment modifier is missing or does not match the item

CARC 16

the claim lacks information needed to adjudicate the line, such as an order, NPI or required modifier

For teams evaluating QuickIntell software

Where QuickIntell fits for A4637 claims

QuickAuth coordinates the requirement checks and documentation that DME claims for A4637 depend on, with human review of each case, and QuickRCM carries claim readiness and the CARC 50, 151 and modifier denials these items draw.

See QuickAuth for requirement checksSee QuickRCM for denial follow-up
Book a software demoAsk about a software workflow

Optional software evaluation, not payer support or help with an individual claim. For coverage or payment decisions, use the official sources on this page. Do not include patient information in a demo booking or inquiry.

Frequently asked questions: HCPCS A4637

What does HCPCS code A4637 describe?

"Replacement, tip, cane, crutch, walker, each." (short descriptor "Repl tip cane/crutch/walker"), in the A section (transportation, medical and surgical supplies, administrative, miscellaneous and investigational). Added 1991-01-01; last action N (no maintenance) effective 1996-01-01.

Is A4637 a CPT code?

No: CMS maintains A4637 in HCPCS Level II, while the AMA maintains CPT. It goes in the same procedure-code field.

What does Medicare pay for A4637?

A4637 is paid from the DMEPOS fee schedule as inexpensive and other routinely purchased items (IN): NU (purchased, new) $2.20 in every contiguous state, rural $2.22 to $2.42; NU-KE (purchased, new) no state fee, rural $2.38 to $2.61; RR (rental) $0.22 in every contiguous state, rural $0.26 to $0.29 (3 more modifier rows on this page), October 2026.

How many units of A4637 can be billed per day?

MUE limits for A4637: practitioner 0 (MAI 3, CMS Policy); hospital outpatient 0 (MAI 3, CMS Policy); DME supplier 4 (MAI 2, Code Descriptor / CPT Instruction). For the DME supplier MUE (MAI 2), units above 4 deny for the whole day as a policy limit; denials arrive as CARC 151.

Does Medicare cover A4637?

Coverage code D (special coverage instructions apply). 2 active LCDs list A4637: L33733 (Canes and Crutches), L33791 (Walkers).

Sources

Every figure on this page is taken from the CMS publications below, as released by the Centers for Medicare & Medicaid Services. Projection built 2026-10-10. Verify against the primary file before billing or contracting decisions. The reference methodology explains how each figure is computed from these files.

Disclaimer

This page is an operational reference compiled from CMS publications: the HCPCS Level II file, the physician, DMEPOS and clinical laboratory fee schedules, OPPS and ASC addenda, NCCI MUE, PTP and add-on edit tables and the Medicare Coverage Database. Amounts are Medicare national figures before locality and state adjustment; Medicaid and commercial payers set their own. CPT codes are shown as numbers only; CPT descriptors are copyright AMA. Nothing here is legal, clinical or billing advice.

Found a figure that does not match the CMS file? Report a data correction with the CMS file and the value you expected; the request reaches the editorial team through the contact form.